ASPEN AEROGELS INC
Total Trades
19
Buys
10
Sells
6
Largest Trade
$1M+
Insiders
10
Institutional Funds
139
Inst. Value
$1M+
Activist Filings
22
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Young Donald R | President and CEO | SELL | $100K–$500K | 57K | $3.23 | Nov 14, 2025 |
| Young Donald R | President and CEO | BUY | $100K–$500K | 20K | $5.35 | May 13, 2025 |
| Young Donald R | President and CEO | SELL | $1M+ | 63K | $30.03 | Oct 1, 2024 |
| RODRIGUEZ RICARDO C. | CFO & Treasurer | EXERCISE | $100K–$500K | 25K | $6.81 | Aug 28, 2024 |
| RODRIGUEZ RICARDO C. | CFO & Treasurer | SELL | $500K+ | 32K | $30.14 | Aug 28, 2024 |
| Young Donald R | President and CEO | SELL | $1M+ | 434K | $29.29 | May 30, 2024 |
| Young Donald R | President and CEO | EXERCISE | $1M+ | 691K | $8.22 | May 30, 2024 |
| Kool Kathleen | Director | EXERCISE | $50K–$100K | 4K | $12.15 | May 23, 2024 |
| Kool Kathleen | Director | SELL | $100K–$500K | 4K | $27.30 | May 23, 2024 |
| Landes Gregg | SVP | SELL | $1K–$15K | 155 | $11.01 | Nov 20, 2023 |
| Mitchell Steven R | Director | BUY | $15K–$50K | 8K | $6.50 | Sep 8, 2023 |
| Mitchell Steven R | Director | BUY | $100K–$500K | 50K | $6.17 | Sep 6, 2023 |
| Noetzel Mark L | Director | BUY | $15K–$50K | 4K | $5.65 | Aug 22, 2023 |
| Young Donald R | President and CEO | BUY | $100K–$500K | 25K | $6.83 | Aug 8, 2023 |
| SWEETNAM JAMES E | Director | BUY | $15K–$50K | 3K | $11.30 | Dec 7, 2022 |
| Wood River Capital, LLC | 10% Owner | BUY | $1M+ | 10.5M | $9.50 | Dec 7, 2022 |
| Young Donald R | President and CEO | BUY | $50K–$100K | 5K | $14.63 | May 12, 2022 |
| KOCH INDUSTRIES INC | 10% Owner | BUY | $1M+ | 1.8M | $27.90 | Mar 30, 2022 |
| Gervis Robert M. | Director | BUY | $1M+ | 136K | $33.12 | Mar 23, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 139 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| KIM, LLC | 12.3M | $1M+ | SH |
| OAKTOP CAPITAL MANAGEMENT II, L.P. | 4.4M | $1M+ | SH |
| VANGUARD GROUP INC | 4.1M | $1M+ | SH |
| GEORGE KAISER FAMILY FOUNDATION | 3.2M | $1M+ | SH |
| STATE STREET CORP | 2.5M | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 1.9M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 1.4M | $1M+ | SH |
| AMERICAN CENTURY COMPANIES INC | 1.2M | $1M+ | SH |
| GAGNON SECURITIES LLC | 1.1M | $1M+ | SH |
| Telemark Asset Management, LLC | 1.0M | $1M+ | SH |
| BNP PARIBAS FINANCIAL MARKETS | 691K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 540K | $1M+ | SH |
| Samjo Management, LLC | 505K | $1M+ | SH |
| FirstWave Capital Management LLC | 372K | $1M+ | SH |
| AQR CAPITAL MANAGEMENT LLC | 368K | $1M+ | SH |
| LOS ANGELES CAPITAL MANAGEMENT LLC | 119K | $500K+ | SH |
| GOLDMAN SACHS GROUP INC | 297K | $500K+ | SH |
| Samjo Management, LLC | 294K | $500K+ | SH |
| JANE STREET GROUP, LLC | 264K | $500K+ | SH |
| SG Americas Securities, LLC | 263K | $500K+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
NEEDHAM INVESTMENT MANAGEMENT L.L.C.
SC 13G · Feb 13, 2026
5.3%
4.4M shares
Oaktop Capital Management II, L.P.
SC 13G/A · May 15, 2025
5.3%
4.4M shares
Oaktop Capital Management II, L.P.
SC 13G/A · May 15, 2025
5.3%
4.4M shares
SC 13G/A · Feb 12, 2025
1.5%
1.2M shares
SC 13G/A · Nov 12, 2024
5.4%
4.1M shares
SC 13G · Nov 12, 2024
5.3%
4.1M shares
SC 13G/A · Nov 4, 2024
5.4%
4.1M shares
George Kaiser Family Foundation
SC 13G/A · Oct 22, 2024
4.1%
3.2M shares
SC 13D/A · Aug 19, 2024
15.9%
12.3M shares
SC 13D/A · Aug 3, 2024
0.0%
0 shares
SC 13D/A · May 16, 2024
20.3%
16.2M shares
SC 13G · Jan 31, 2024
5.3%
4.1M shares
Encompass Capital Advisors LLC
SC 13G/A · Feb 14, 2023
4.5%
3.0M shares
Oaktop Capital Management II, L.P.
SC 13G/A · Feb 14, 2023
4.8%
3.2M shares
Telemark Asset Management, LLC
SC 13G/A · Feb 3, 2023
3.0%
6 shares
Telemark Asset Management, LLC
SC 13G/A · Feb 3, 2023
3.0%
6 shares
SC 13D/A · Dec 7, 2022
27.6%
19.2M shares
Encompass Capital Advisors LLC
SC 13G · Jul 8, 2022
7.6%
2.7M shares
SC 13D/A · May 3, 2022
0.0%
0 shares
SC 13D · Apr 5, 2022
9.7%
3.5M shares
SC 13G/A · Feb 22, 2022
9.6%
3.5M shares
Telemark Asset Management, LLC
SC 13G/A · Jan 28, 2022
5.6%
6 shares